Julia Koch, the widow of billionaire industrialist David Koch, has sold her duplex at the exclusive Manhattan co-op 740 Park Avenue for $45 million, according to property records. The Kochs paid ...

The seller was Julia Koch, widow of the late billionaire industrialist David Koch, The Post previously reported. Billionaire hedge funder Ken Griffin, known for amassing a massive real estate ...

Julia Koch, one of the world’s richest women with an estimated net worth of $74.2 billion, according to Forbes, has just sold her co-op at the exclusive Park Avenue palace for $45 million ...